コード例 #1
0
// FindLiteral
bool COpcTextReader::FindLiteral(COpcText& cToken)
{
    OPC_ASSERT(m_szBuf != NULL);
    OPC_ASSERT(m_uLength != 0);

    LPCWSTR szText  = cToken.GetText();
    UINT    uLength = (szText != NULL)?wcslen(szText):0; 

    // check for trivial case
    if (uLength == 0)
    {
        return false;
    }

    UINT uPosition = SkipWhitespace(cToken);

    // check if there is enough data.
    if (uLength > (m_uEndOfData - uPosition))
    {
        return false;
    }

    for (UINT ii = uPosition; ii < m_uEndOfData-uLength+1; ii++)
    {
        // check if search halted.
        if (CheckForHalt(cToken, ii))
        {
            return false;
        }

        // compare text at current position.
        if (IsEqual(cToken, m_szBuf+ii, szText, uLength))
        {
            CopyData(cToken, ii, ii+uLength);
            return true;
        }

        // stop search if leading unmatching characters are not ignored.
        if (!cToken.GetSkipLeading())
        {
            break;
        }
    }

    return false;
}